Name: ASTM A234 WP22 CL1 / CL3 Alloy Steel Buttweld Fitting 180 Degree Elbow Black Painted
Brand: Yuhong Group Co.,Ltd
SKU: ASTM A234 WP22 Alloy Steel 180 Degree Elbow
Price: 100000 USD
Availability: InStock

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ASTM A234 WP22 CL1 / CL3 Alloy Steel Buttweld Fitting 180 Degree Elbow Black Painted

Product Details:

Place of Origin:	CHINA
Brand Name:	YUHONG
Certification:	ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number:	ASTM A234 WP22 Alloy Steel 180 Degree Elbow

Payment & Shipping Terms:

Minimum Order Quantity:	1 PC
Packaging Details:	Plwood case or Pallet
Delivery Time:	7 DAYS
Payment Terms:	L/C, T/T

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Detailed Product Description

Product Name:	Alloy Steel Elbow	Specification:	ASTM A234, ASME SA234
Material:	WP22	O.D.:	1/8”NB To 48”NB
W.T.:	Schedule 10s - Schedule XXS	Material Class:	Class 1, Class 3
Type:	180 Degree
Highlight:	ASTM A234 WP22 alloy steel elbow , black painted buttweld fitting , 180 degree steel pipe elbow

ASME B16.9 Buttweld Pipe Fitting ASTM A234 WP22 CL1 / CL3 180 Degree Alloy Steel Elbow

A factory-made, 180-degree return bend (U-bend) pipe fitting manufactured from 2.25% chromium – 1% molybdenum alloy steel per ASTM A234 Grade WP22, supplied in either Class 1 (standard heat treatment) or Class 3 (impact tested) condition, with butt-weld end connections conforming to ASME B16.9, and finished with a temporary black shop primer coating for corrosion protection during transit and storage.

Why 180° elbow? To save space vs. two 90° elbows + straight pipe. Also lower pressure drop than a cast return bend.

Chemical Composition % of ASTM A234 WP22 Alloy Steel 180Deg. Elbow Buttweld Pipe Fitting

Grade	C	Mn	Si	S	P	Cr	Mo
ASTM A234 WP22 Fittings	0.05-0.15	0.3-0.6	0.5	≤0.04	≤0.04	1.9-2.6	0.87-1.13

Mechanical Property of ASTM A234 WP22 Alloy Steel 180Deg. Elbow Buttweld Pipe Fitting

The Differences between CL1 and CL3 under ASTM A234, reflecting on its heat treatment and strength.

Property	Class 1	Class 3
Tensile Strength (MPa)	415–585	515–690
Yield Strength (MPa)	205 min	310 min
Elongation (%)	20 min	20 min
Hardness (HB)	~197 max	~235 max

Specification of ASTM A234 WP22 Alloy Steel 180Deg. Elbow Buttweld Pipe Fitting

Specifications	ASTM A234 / ASME SA234
Dimensions	ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Size	1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated)
Material Class	Class 1, Class 3
Type	Seamless / Welded / Fabricated
Bending Radius	R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Thickness	Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS

Coating: Black Painted

Purpose: Temporary in-transit corrosion protection. It is NOT a final corrosion barrier.
Why Paint? WP22 alloy steel will rust if exposed to moisture. The black paint (usually an alkyd or epoxy shop primer) protects during storage and shipping.
Crucial Instruction: You must remove the black paint from the weld bevel and 1-2 inches of the adjacent pipe surface before welding. Painting on Cr-Mo steel can cause hydrogen cracking in the heat-affected zone (HAZ) if not removed.
Final Coating: After welding and post-weld heat treatment (PWHT), the elbow will likely require high-temperature paint or insulation.

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